"You will consider those notions of my youth poor silly violent stuff; particularly if you are of the younger generation born since the Change you will be of that opinion. Nowadays the whole world thinks clearly, thinks with deliberation, pellucid certainties; you find it impossible to imagine how any other thinking could have been possible. Let me tell you then how you can bring yourself to something like the condition of our former state. In the first place you must get yourself out of health by unwise drinking and eating, and out of condition by neglecting your exercise; then you must contrive to be worried very much and made very anxious and uncomfortable, and then you must work very hard for four or five days and for long hours every day at something too petty to be interesting, too complex to be mechanical, and without any personal significance to you whatever. This done, get straightway into a room that is not ventilated at all, and that is already full of foul air, and there set yourself to think out some very complicated problem. In a little while you will find yourself in a state of intellectual muddle, annoyed, impatient, snatching at the obvious, presently choosing and rejecting conclusions haphazard. Try to play chess under such conditions and you will play stupidly and lose your temper. Try to do anything that taxes the brain or temper and you will fail. Now the whole world before the Change was as sick and feverish as that; it was worried and over-worked and perplexed by problems that would not get stated simply, that changed and evaded solution, it was in an atmosphere that had corrupted and thickened past breathing; there was no thorough cool thinking in the world at all. There was nothing in the mind of the world anywhere but half-truths, hasty assumptions, hallucinations, and emotions. Nothing..."